Improvement in pumps



thvrrnn States Patent @rrrca \VILLIAM N. SLASON, OF SOUTH READING, MASSACHUSETTS.

IMPROVEMENT lN PUMPS.

Specification forming part of Letters Patent No. 217,576, dated March 20, 1860.

T0 at] whom it may concern:

Be it known that I, WILLIAM N. Season, of South Reading, in the county of Middlesex and State of Massachusetts, have invented an Improved Steam Pumping Apparatus; and I do hereby declare that the same is fully described a-nd represented in the following sp eci Iication and the accompanying drawings, of.

which- Figure 1 is a front side elevation of my double-acting or steam pump as it would appear were the front plate of its case removed from the said case. Fig. 2 is a transverse and central sect-ion showing the front plate in its placeinthe case. Fig. 3 is a side viewof such plate. Fig. 4 is a rear elevation of the whole apparatus. I

In such drawings, A represents a rocking or oscillating piston havinga longitudinal section of a lozenge form, or thereabout, it being placed within a chamber, B, formed by two vertical plates, to b, two horizontal plates, 0 d,

and a circular, curved, or arched rim, C, ar ranged with respect to one another, as seen in the drawings, such arrangement causing a wedge-shape chamber to be formed against each flat side of the said piston, as shown at D E F G. The lowermost two of the chant-- bersviz., 1 and G1 denominate pum p chambers, while the other or upper two, D E, may serve the purpose of steam-chambers of a steam-engine. The piston at its lower angle or edge, or, rests and turns on a cylindrical bearing or shaft, e, supported by the plate (1, while at the vertex y of its upper an gle the said piston bears against the concave curved lower surface of a projection, f, extended from the plate 0, such curved surface being concentric with the bearin e. The piston at the vertices of its other two opposite angles touches the curved surface of the rim 0. Each of the pump-chambers not only has an induction pipe or passage, furnished with a valve, h, to open inward, but an eduction passage or pipe, t, leading therefrom and into an air-chamber, H. \Vhere the pipe 2' enters the said chamber H a valve, 7:, may be applied to it, to open upward into the chamber. (See Fig. 5, which is a longitudinal and vertical section oi. the air-chamber H.) A discharge-pipe, Z, is led out of the airchanr ber. Furthermore, in constructing the apparatus I not only connect the double-wedgeshaped piston A at its opposite ends, in m, directly to the arched rim 0, (which in this case should be carried or made to extend below the bottom plate, d, as shown in the drawings,) but I separate the said rim 0 from the plates (t b c d, and connect the last two of such plates at their opposite sides to the vertical side plates, a 1). Under these circumstances, when the piston is being put in movement, it will. cause the arched rim O to move simul taneously with it and against the opposite edges of the plates at b 0 (Z. So if the arched rim be moved it will move or oscillate the piston, Such arched rim may have a handle or arm, at, extending from it, as shown in the drawings, and such may serve to enable a person to put the rim in movement, so as to cause the piston to move in the pump. Unless the piston is moved by means of the arched rim connected to it the said piston would not only have to be separated from the arched rim, but it would be necessary to have the bearing 0 fastened to the piston and extended through and beyond one side of the case. By apply ing power to the bearing and turning it, the piston may then be put in movement. The connection of the piston at its ends with the arched rim, applied so as to be capable of being on the ends of the plates 0 d, as described, is advantageous, inasmuch as it renders it necessary to pack the piston only on its two opposite larger vertical edges, and, furthermore, it affords a convenient means of operating the piston, either by the steam-engine over it when arranged over it) or by the brake or other suitable equivalent. The two chambers D E may have steam-engine valve-chests and valves applied to them, as such are usuall applied to the main cylinder of a steam-engine and its piston. Such valve-chests I have shown at K L with a valve-rod, M, extending from one to the other, and having an arm, N, extending down into it from the arched rim 0, the same being so as to cause the valve-rod to be moved in a longitudinal direction with a reciprocating motion by the arched rim 0 during its motions. The slide-valves of the valve-chests, and the ports for the entrance of steam into and its discharge from the two engine-chambers D E, should be so applied as to enable the steam to produce a reciprocating oscillatory movement of the piston. The mode of constructing and applying such valves,

Connecting the rocker-piston to the curved remainder of the ease as to enable both piston and rim to be moved together or simultaneously relatively to the said remainder of the case, as specified.

' win N. SEASON.

% rim of its ease, and so applying such rim to the Vitnesses:

R. H. EDDY, F. P. IIALE, J r. 

